A detailed analysis of the rapid changes in ice-core parameters during the last ice age
Results from deep Greenland ice cores show rapid changes in several parameters in the deepest part. The most probable explanation for these variations is a fast-changing climate during part of the last glaciation. The question arises, however, of whether the observed changes in the ice cores could a...
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International Glaciological Society
1988
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ftunivbern:oai:boris.unibe.ch:158762 2023-08-20T03:59:48+02:00 A detailed analysis of the rapid changes in ice-core parameters during the last ice age Staffelbach, T. Stauffer, B. Oeschger, H. 1988 application/pdf https://boris.unibe.ch/158762/1/a-detailed-analysis-of-the-rapid-changes-in-ice-core-parameters-during-the-last-ice-age.pdf https://boris.unibe.ch/158762/ eng eng International Glaciological Society https://boris.unibe.ch/158762/ info:eu-repo/semantics/restrictedAccess Staffelbach, T.; Stauffer, B.; Oeschger, H. (1988). A detailed analysis of the rapid changes in ice-core parameters during the last ice age. Annals of glaciology, 10, pp. 167-170. International Glaciological Society 10.3189/S0260305500004377 <http://dx.doi.org/10.3189/S0260305500004377> 530 Physics info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion PeerReviewed 1988 ftunivbern https://doi.org/10.3189/S0260305500004377 2023-07-31T22:08:19Z Results from deep Greenland ice cores show rapid changes in several parameters in the deepest part. The most probable explanation for these variations is a fast-changing climate during part of the last glaciation. The question arises, however, of whether the observed changes in the ice cores could also be due to, or at least be influenced by, discontinuities in the stratigraphy. We present new CO2 and δ18O data from the Camp Century and Dye 3 deep ice cores. The data show rapid changes in CO2 and δ18O in both cores. One transition which was investigated in detail seems to be more rapid in the ice core from Dye 3 than in the Camp Century core. The broadening of a sharp δ18O transition due to molecular diffusion is discussed. Since this broadening is larger than the observed width of the transition, we discuss the possibility of a mechanism that can produce stratigraphic disturbances on a small scale. This mechanism is based on a calculation of the compression of horizontal layers which have equal density but different viscosities. Conference Object Annals of Glaciology Dye 3 Dye-3 Greenland Greenland ice cores ice core BORIS (Bern Open Repository and Information System, University of Bern) Greenland Annals of Glaciology 10 167 170 |
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Open Polar |
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BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Staffelbach, T. Stauffer, B. Oeschger, H. A detailed analysis of the rapid changes in ice-core parameters during the last ice age |
topic_facet |
530 Physics |
description |
Results from deep Greenland ice cores show rapid changes in several parameters in the deepest part. The most probable explanation for these variations is a fast-changing climate during part of the last glaciation. The question arises, however, of whether the observed changes in the ice cores could also be due to, or at least be influenced by, discontinuities in the stratigraphy. We present new CO2 and δ18O data from the Camp Century and Dye 3 deep ice cores. The data show rapid changes in CO2 and δ18O in both cores. One transition which was investigated in detail seems to be more rapid in the ice core from Dye 3 than in the Camp Century core. The broadening of a sharp δ18O transition due to molecular diffusion is discussed. Since this broadening is larger than the observed width of the transition, we discuss the possibility of a mechanism that can produce stratigraphic disturbances on a small scale. This mechanism is based on a calculation of the compression of horizontal layers which have equal density but different viscosities. |
format |
Conference Object |
author |
Staffelbach, T. Stauffer, B. Oeschger, H. |
author_facet |
Staffelbach, T. Stauffer, B. Oeschger, H. |
author_sort |
Staffelbach, T. |
title |
A detailed analysis of the rapid changes in ice-core parameters during the last ice age |
title_short |
A detailed analysis of the rapid changes in ice-core parameters during the last ice age |
title_full |
A detailed analysis of the rapid changes in ice-core parameters during the last ice age |
title_fullStr |
A detailed analysis of the rapid changes in ice-core parameters during the last ice age |
title_full_unstemmed |
A detailed analysis of the rapid changes in ice-core parameters during the last ice age |
title_sort |
detailed analysis of the rapid changes in ice-core parameters during the last ice age |
publisher |
International Glaciological Society |
publishDate |
1988 |
url |
https://boris.unibe.ch/158762/1/a-detailed-analysis-of-the-rapid-changes-in-ice-core-parameters-during-the-last-ice-age.pdf https://boris.unibe.ch/158762/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Annals of Glaciology Dye 3 Dye-3 Greenland Greenland ice cores ice core |
genre_facet |
Annals of Glaciology Dye 3 Dye-3 Greenland Greenland ice cores ice core |
op_source |
Staffelbach, T.; Stauffer, B.; Oeschger, H. (1988). A detailed analysis of the rapid changes in ice-core parameters during the last ice age. Annals of glaciology, 10, pp. 167-170. International Glaciological Society 10.3189/S0260305500004377 <http://dx.doi.org/10.3189/S0260305500004377> |
op_relation |
https://boris.unibe.ch/158762/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3189/S0260305500004377 |
container_title |
Annals of Glaciology |
container_volume |
10 |
container_start_page |
167 |
op_container_end_page |
170 |
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1774715736770478080 |